Finding the Fourth Proportional to 123,971.72, 171,082.20 and 73,661

Step by Step Solution

1. Step 1: Write the proportion equation
   123,971.72 : 171,082.20 = 73,661 : x
2. Step 2: Convert to fraction form
   123,971.72/171,082.20 = 73,661/x
3. Step 3: Cross multiply
   123,971.72x = 171,082.20 × 73,661
4. Step 4: Simplify right side
   123,971.72x = 12,602,085,934.20
5. Step 5: Solve for x
   x = 12,602,085,934.20/123,971.72
6. Step 6: Final answer
   x = 101,652.91